"off one's rocker" meaning in English

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        {
          "text": "He's off his rocker if he thinks he can tackle the whole thing alone.",
          "type": "example"
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        {
          "ref": "1960, P[elham] G[renville] Wodehouse, chapter VIII, in Jeeves in the Offing, London: Herbert Jenkins, →OCLC, page 86:",
          "text": "“Bertie! Your manner is strange.”\n“Your manner would be strange if you'd been sitting on the floor of Wilbert Cream's sleeping apartment with a chair round your neck, and Ma Cream had come in.”\n“Golly! Did she?”\n“In person.”\n“What did you say?”\n“I said I was looking for a mouse.”\n“Couldn't you think of anything better than that?”\n“No.”\n“And how did it all come out in the end?”\n“I melted away, leaving her plainly convinced that I was off my rocker.”",
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      "glosses": [
        "Crazy; insane."
      ],
      "id": "en-off_one's_rocker-en-prep_phrase-fJmb6E8R",
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        [
          "Crazy",
          "crazy"
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          "insane"
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        "(slang) Crazy; insane."
      ],
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      "translations": [
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "crazy",
          "word": "olla ruuvi löysällä"
        },
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "crazy",
          "word": "olla päästään vialla"
        },
        {
          "code": "sv",
          "lang": "Swedish",
          "sense": "crazy",
          "word": "rubbad"
        },
        {
          "code": "sv",
          "lang": "Swedish",
          "sense": "crazy",
          "word": "inte ha alla hästar hemma"
        }
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  "word": "off one's rocker"
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          "text": "He's off his rocker if he thinks he can tackle the whole thing alone.",
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        },
        {
          "ref": "1960, P[elham] G[renville] Wodehouse, chapter VIII, in Jeeves in the Offing, London: Herbert Jenkins, →OCLC, page 86:",
          "text": "“Bertie! Your manner is strange.”\n“Your manner would be strange if you'd been sitting on the floor of Wilbert Cream's sleeping apartment with a chair round your neck, and Ma Cream had come in.”\n“Golly! Did she?”\n“In person.”\n“What did you say?”\n“I said I was looking for a mouse.”\n“Couldn't you think of anything better than that?”\n“No.”\n“And how did it all come out in the end?”\n“I melted away, leaving her plainly convinced that I was off my rocker.”",
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      "glosses": [
        "Crazy; insane."
      ],
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          "Crazy",
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          "insane",
          "insane"
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        "(slang) Crazy; insane."
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  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "crazy",
      "word": "olla ruuvi löysällä"
    },
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "crazy",
      "word": "olla päästään vialla"
    },
    {
      "code": "sv",
      "lang": "Swedish",
      "sense": "crazy",
      "word": "rubbad"
    },
    {
      "code": "sv",
      "lang": "Swedish",
      "sense": "crazy",
      "word": "inte ha alla hästar hemma"
    }
  ],
  "word": "off one's rocker"
}